22870440 has 192 divisors, whose sum is σ = 81628560. Its totient is φ = 5529600.

The previous prime is 22870411. The next prime is 22870447. The reversal of 22870440 is 4407822.

It can be written as a sum of positive squares in 8 ways, for example, as 22071204 + 799236 = 4698^2 + 894^2 .

It is not an unprimeable number, because it can be changed into a prime (22870447) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 226390 + ... + 226490.

Almost surely, 2^22870440 is an apocalyptic number.

22870440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22870440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40814280).

22870440 is an abundant number, since it is smaller than the sum of its proper divisors (58758120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22870440 is a wasteful number, since it uses less digits than its factorization.

22870440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172 (or 165 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 22870440 is about 4782.3048836309. The cubic root of 22870440 is about 283.8517046324.

The spelling of 22870440 in words is "twenty-two million, eight hundred seventy thousand, four hundred forty".